Apparatus for vulcanizing rubber



G. E. HAYES.

r SPRING CLAMP AND PLASK FOR VULGANIZING RUBBER COMPOUND FOR BASE OI ARTIFICIAL TEETH.

No. 28,668. Patented June 12, 1860.

Invert/{fax UNITED S AT PATE T UFFIECE GEORGE HAYES, or BUFFALO, NEW YORK.

nPrAnATUs FOR vuLoa v znve RUBBER.

,' Specification of Letters Patent No. 28,668, dated June 12, 186 0.

To all whom it may concern: ciently deep to hold I the plaster mold in Beit known that I, GEORGE E. HAYES, of connection with the bottom piece. I It has the c ty of Bufialo and State of New York, projecting nibs ,h which ,fit into correspondhave mvented certaln new and useful Iming recesses, y" in the bottom piece when they 60 5 provements n Flasks and Clamps for Vulare put together. It also has a semicircular canrzlng Rubber Compound for Bases of recess, 1, for the reception .of the spring v Artificial Teeth; and 'I do hereby declare rod E. i

I that the following ,is a full and exact de- J, represents the bottom part oftheflask.

scription thereof, reference being had to .Itssides or rim (J rise about half an inch 65 the accompanying drawings, and the letters soas to form asort of cup or basin. Italso h of reference marked thereon, making a part has .a circular recess or depression as shown of tl 11S- specification, in which at j, Fig. III, which depression corresponds F gure I, is a perspective O th packing to the circular emboss on the upper plate clamp and flask as used in combination. It also has a semi-circular recess I, for the 70 b 15 FigQI'I, is a section of same. Fig. 111, is reception of the back (,4) of ,the clamp. an elevation of two flasks and clamp as put These recesses correspondin each .part of together for vulcanizing. Fig. IV, is a the flask, so that when the three ,parts are perspective of the top plate of the flask. put together and the flask .put into the Fig. V, is a perspective of the main body clamp, the back (Z, and spring rod E will 75 or middle portion of the flask. Fig. VI, is occupy this recess, so that a vulcanizer of a perspective of the lower plate of the flask. no larger diameter will be required on ack Letters of like name and kind refer to count of the clamp than is required for the like parts in each of the figures. flask alone, the clamp being contained with- A, Figs. I and II, represents the bottom in the outer circle of the flask, and the flask 80 piece of the packing clamp made of cast iron being so constructed as to occupy the least having a central opening, Z), and circular possible space.

groove, 0, and upward projection or back 61, The improvements in the flask and clamp E represents a rod of spring steel which herein described enable me to bring my screws into the bottom piece A, and is also whole apparatus to the smallest possible di- 85 braced or supported by the back d. It rises mensions, and hence I can vulcanize the rubperpendicularly about three inches in the her compound with about half the volumes packing clamp and about six inches (more or of steam hitherto used, and hence cheapen less) in the vulcanizing clamp and then the process and render it more safe. The bends over, so as to overhang the bottom emboss, g, in combination with the depres- 90 piece as shown at E. A set screw F, passes sion, j, serve to prevent the flasks from slipthrough this overhanging part, by which ping sidewise when put into the clamp. any required amount of compression can The clamp represented in Fig. III varies be applied to the flask. slightly from the one shown in Figs. I and The flask is made in three parts. The II. The bottom piece has a depression to 95 40 upper part is shown at G (Figs. I, II, II, admit the emboss of the upper plate as and IV). It has a circular emboss as shown at a. The spring rod is also made shown at g and countersinks to receive longer so as to receive three flasks for vulr the end of the set screw as shown at 9 canizing at the same time, and the bent por- It also has small projecting nibs as shown tion of it a little shorter so as to bring the 100 at g which nibs fit inside of the middle point of the set screw on or over the center piece, H, and hold it in place when the two of the flask as shown in Fig. III. parts are put together. It also has a semi- K, represents a cast iron blank which is circular recess as shown at I, for the purpose used to fill up the space between the flasks of affording room for the spring rod (E) and set screw. hen but two flasks are put 105 within the outer circle of the flask. As a into the clamp it sets in the circular depresmodification of this recess a simple hole may sion made in the bottom piece of the flask as be made through the flask but in practice shown in Fig. III, and has a countersink at b I prefer the recess as more convenient and the top for the point of the set screw. In

efficient. case there should be but one flask put into 110 H, represents the main body or central the clamp, then a longer blank occupying part of the flask. This is made sutfithe space of two flasks should be used in like manner. When three flasks are put into the clamp they will fill up the entire space so that the set screw will strike upon the upper flask, in which case no blank need be used.

Operation: The rubber compound is put into the packing flask in the usual manner, and the flask is then put into the packing clamp as represented in Figs. I and II. The set screw is then turned down so as to strain the spring rod, E, and press heavily upon the flask. As the rubber compound is gradually softened by warming the flask, it will yield to the pressure, and the reaction of the spring rod Will follow up the yielding nature of the softened compound, and thus keep a continual and uniform pressure upon the compound until it is brought within its required dimensions in the flask. The position of this flask may be changed in the clamp so as to bring either one of the countersinks, (9 under the set screw, and thereby vary the point of greatest pressure, as may be required. After passing through this process in the packing-clamp, the flask is put into the vulcanizing clamp Fig. III in a reversed position. One, two, or three flasks may be put into this clamp, as before described, the emboss of one fitting into the depression of the other, and the whole put into the vulcanizer with the set screw downward, and the rubber compound in each flask will be vulcanized at the same time.

The vulcanizer can be made very compact and strong, with a cylinder just large enough to receive the flasks, and so that a half pint of Water will be sufficient to generate steam enough for the purpose.

hat I claim as my improvement in vulcanizing apparatus, and as my invention, 15

1. A spring clamp, constructed and operating for the purpose, and substantially as herein described.

2. Constructing the flask with a recess I, for the purposes, and substantially as set forth.

3. The circular emboss (g) in combination with the corresponding depression j for the purposes substantially as described.

GEO. E. HAYES. 1

\Vitnesses E. M. DAVIS, WALTER I-I. FORBUSH. 

